Boot

Abstract

A boot of the present invention is a boot that is formed into a cylindrical shape that is extendable and contractible in an axis direction and can be mounted to a mounting portion O1 of a mounting target object O by injecting fluid inside the boot by a fluid injecting unit FI, wherein the boot 1 comprises an annular mounted portion 11 that is provided on one end 1a side in the axis X direction and is to be mounted to the mounting portion O1, an abutting portion 12 that is provided on an other end 1b side in the axis X direction and onto which a tip FIa of the fluid injecting unit FI can abut toward the one end la side in the axis X direction along the axis X direction, and an extendable/contractible portion EC that extends along the axis X direction between the mounted portion 11 and the abutting portion 12, and wherein the abutting portion 12 extends along a radial direction on the other end 1b side of the boot 1 in the axis X direction of the boot 1, is formed into an annular shape along a direction around the axis of the boot 1, and is provided, on an inner side in the radial direction of the abutting portion 12, with an opening 12a that allows fluid communication between the inside and the outside of the boot 1. With such a structure, it is possible to provide a boot that can be easily mounted to the mounting portion of the mounting target object.

1 . A boot that extends along an axis direction, is formed into a cylindrical shape that is extendable and contractible in the axis direction, and can be mounted to a mounting portion of a mounting target object by injecting fluid inside the boot by a fluid injecting unit, wherein the boot comprises:
 an annular mounted portion that is provided on one end side in the axis direction and is to be mounted to the mounting portion,   an abutting portion that is provided on an other end side in the axis direction and onto which a tip of the fluid injecting unit can abut toward the one end side in the axis direction along the axis direction, and   an extendable/contractible portion that extends along the axis direction between the mounted portion and the abutting portion, and   wherein the abutting portion extends along a radial direction on the other end side of the boot in the axis direction of the boot, is formed into an annular shape along a direction around the axis of the boot, and is provided, on an inner side in the radial direction of the abutting portion, with an opening that allows fluid communication between an inside and an outside of the boot.   
     
     
         2 . The boot of  claim 1 , wherein the abutting portion extends to an inner side and an outer side in the radial direction of the boot. 
     
     
         3 . The boot of  claim 1 or 2 , wherein the mounting target object has an extension portion that extends along the axis direction in at least a part of the inside of the boot when the boot is mounted,
 wherein the boot comprises a guiding portion that guides the extension portion so as to extend and contract along the axis direction with respect to the extension portion, and   wherein the guiding portion extends to the inner side in the radial direction from an inner circumference of the boot, is formed into an annular shape along the direction around the axis of the boot, and is provided, on the inner side in the radial direction of the guiding portion, with an insertion hole through which the extension portion can be inserted.   
     
     
         4 . The boot of  claim 3 , wherein at least a part of the abutting portion is provided on a surface of the guiding portion on the other end side in the axis direction. 
     
     
         5 . The boot of any one of  claims 1 to 4 , wherein the abutting portion is formed into a plate shape deformable in the axis direction. 
     
     
         6 . The boot of any one of  claims 1 to 5 , wherein the boot comprises, on an outer periphery of the abutting portion in the radial direction, an axis misalignment-suppressing portion that suppresses axis misalignment of the tip of the fluid injecting unit relative to the opening when the tip of the fluid injecting unit abuts onto the abutting portion.